fix(cpus): fix the rev-var of Neoverse-V1

Update the revision and variant information in the
errata ABI file, neoverse_v1.S file for erratum ID - 2294912
to match the revision and variant in the latest SDEN.

SDEN documentation:
https://developer.arm.com/documentation/SDEN-1401781/latest

Change-Id: I38a0f53c3515860ba442b5c0872c8ab051fdda6f
Signed-off-by: Sona Mathew <sonarebecca.mathew@arm.com>
(cherry picked from commit ab2b56df266f73aa53ca348d7945b119e1ef71c7)
diff --git a/docs/design/cpu-specific-build-macros.rst b/docs/design/cpu-specific-build-macros.rst
index e67fca2..356f420 100644
--- a/docs/design/cpu-specific-build-macros.rst
+++ b/docs/design/cpu-specific-build-macros.rst
@@ -498,7 +498,8 @@
    revision.  It is still open.
 
 -  ``ERRATA_V1_2294912``: This applies errata 2294912 workaround to Neoverse-V1
-   CPU. This needs to be enabled for revisions r0p0, r1p0, and r1p1 of the CPU.
+   CPU. This needs to be enabled for revisions r0p0, r1p0, and r1p1 and r1p2 of
+   the CPU.
 
 -  ``ERRATA_V1_2372203``: This applies errata 2372203 workaround to Neoverse-V1
    CPU. This needs to be enabled for revisions r0p0, r1p0 and r1p1 of the CPU.